WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE STATION APPARATUS, WIRELESS COMMUNICATION METHOD AND INTEGRATED CIRCUIT

• US 20140334412A1
• Filed: 07/22/2014
• Published: 11/13/2014
• Est. Priority Date: 03/04/2010
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: SUZUKI, Shoichi, NAKASHIMA, Daiichiro, NOGAMI, Toshizo
• Granted Patent: US 9,226,287 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/12 Access point controller devices

Abstract

A terminal apparatus that is set to monitor physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets. The terminal apparatus also assumes that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either a physical downlink control channel in the common search space or a physical downlink control channel in the user equipment-specific search space is transmitted on the downlink component carrier.

Claims

1. A terminal apparatus configured to and/or programmed to communicate with a base station apparatus, the terminal apparatus comprising:

a receiving unit configured to and/or programmed to be set to monitor physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets, wherein

the receiving unit being configured to and/or programmed to assume that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either a physical downlink control channel in the common search space or a physical downlink control channel in the user equipment-specific search space is transmitted on the downlink component carrier.

2. The terminal apparatus according to claim 1, wherein

in case that the terminal apparatus is configured with a carrier indicator field associated with monitoring a physical downlink control channel on the downlink component carrier, the receiving unit is configured to assume that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only the physical downlink control channel in the common search space is transmitted on the downlink component carrier.

3. The terminal apparatus according to claim 1, wherein

the physical downlink control channel candidates in the common search space and the user equipment-specific search space are comprised of a same number of control channel elements.

4. A base station apparatus configured to and/or programmed to communicate with a terminal apparatus, the base station comprising:

a transmitting unit configured to and/or programmed to transmit a physical downlink control channel in physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets, wherein

the transmitting unit being configured to and/or programmed to transmit, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either the physical downlink control channel in the common search space or the physical downlink control channel in the user equipment-specific search space on the downlink component carrier.

5. The base station apparatus according to claim 4, wherein

in case that the terminal apparatus is configured with a carrier indicator field associated with monitoring the physical downlink control channel on the downlink component carrier, the transmitting unit is configured to transmit, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only the physical downlink control channel in the common search space on the downlink component carrier.

6. The base station apparatus according to claim 4, wherein

the physical downlink control channel candidates in the common search space and the user equipment-specific search space are comprised of a same number of control channel elements.

7. A communication method used for a terminal apparatus that is configured to and/or programmed to communicate with a base station apparatus, the communication method comprising:

being set to monitor physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets, and

assuming that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either a physical downlink control channel in the common search space or a physical downlink control channel in the user equipment-specific search space is transmitted on the downlink component carrier.

8. The communication method according to claim 7, wherein

in case that the terminal apparatus is configured with a carrier indicator field associated with monitoring a physical downlink control channel on the downlink component carrier, assuming that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only the physical downlink control channel in the common search space is transmitted on the downlink component carrier.

9. The communication method according to claim 7, wherein

the physical downlink control channel candidates in the common search space and the user equipment-specific search space are comprised of a same number of control channel elements.

10. A communication method used for a base station apparatus that is configured to and/or programmed to communicate with a terminal apparatus, the communication method comprising:

transmitting a physical downlink control channel in physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets, and

transmitting, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either the physical downlink control channel in the common search space or the physical downlink control channel in the user equipment-specific search space on the downlink component carrier.

11. The communication method according to claim 10, wherein

in case that the terminal apparatus is configured with a carrier indicator field associated with monitoring the physical downlink control channel on the downlink component carrier, transmitting, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only the physical downlink control channel in the common search space on the downlink component carrier.

12. The communication method according to claim 10, wherein

the physical downlink control channel candidates in the common search space and the user equipment-specific search space are comprised of a same number of control channel elements.